If I visit a community from Feddit and then another instance, the comments often differ. I understand there are some issues with defederation between some instances, but this doesn’t seem related to that.
For example, here’s the post-race discussion on the Formula 1 community on Feddit: https://feddit.uk/post/320484
And then the same discussion on lemmy.world: https://lemmy.world/post/950479
I don’t understand why a significant number of comments aren’t visible on Feddit.
I think it’s what db0 said, so if lemmy.world posts were to stop reaching feddit.uk entirely it might suggest lemmy.world defederating from feddit.uk (not the other way around). That’s not what’s happening here though as we’re not in the blocked list of instances on that domain.